Home / 20,087.61-30,120.12-8,238.12

Finding the Fourth Proportional to 20,087.61, 30,120.12 and 8,238.12

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Solution

The fourth proportional to 20,087.61, 30,120.12 and 8,238.12 is: 12,352.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.61 : 30,120.12 = 8,238.12 : x
  2. Step 2: Convert to fraction form
    20,087.61/30,120.12 = 8,238.12/x
  3. Step 3: Cross multiply
    20,087.61x = 30,120.12 × 8,238.12
  4. Step 4: Simplify right side
    20,087.61x = 248,133,162.97
  5. Step 5: Solve for x
    x = 248,133,162.97/20,087.61
  6. Step 6: Final answer
    x = 12,352.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.